Punnett Squares, Pedigrees and Natural Selection

Which of the following is a PHENOTYPE?

• Aa
• Red hair

• Heterozygous

• DNA

Dominant alleles are represented by a:

• Male gene
• Lowercase letter

• Recessive trait

• Capital letter

If B = brown hair and b = blonde hair, what is the probability of brown hair?

• 25%
• 50%
• 0%
• 75%

Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?

• 50% heterozygous 50% homozygous dominant

• 50% heterozygous 50% homozygous recessive

• 50% heterozygous 25% homozygous recessive 25% homozygous dominant

• 100% heterozygous

How many boxes would say BB?

• 1
• 2
• 4
• 0

How many alleles does a child get from each parent for a trait?

• 1

• 2

• 3

• 4

The genetic makeup of an organism usually represented by alleles. (Ex. AA, Aa, or aa)

• Genotype

• Phenotype

• Heterozygous

• Homozygous

What color eyes do the parents have?

• They both have blue

• They both have brown

• One has blue and one has brown

• Depends on how the genetics work together

What does an open circle represent?

• Not Affected Male
• Not Affected Female
• Affected Male
• Affected Female

What does a filled in square represent?

• Not affected Female
• Not affected Male
• Affected Male
• Affected Female